Onalaska, TX tap water
Supplied mostly by Onalaska WSC, plus 2 other utilities. Here's what the water means for your fish.
Disinfectant
Chlorine or chloramine
Utilities here use chlorine or chloramine, depending on which one serves your address. Chlorine slowly gases off from standing water; chloramine doesn't.
Safety for fish and shrimp
Nitrite (NO₂)
Up to 0.07 ppm (Low)
Typically not detected
Not detected in testing, so any nitrite in your tank comes from the tank itself.
From EPA monitoring data (2012–2019).
Nitrate (NO₃)
0.2–8.3 ppm (Low)
Typical 0.2 ppm
Low, so water changes lower your tank's nitrate well.
From EPA monitoring data (2012–2019).
Water chemistry
General hardness
Area estimate8–224 ppm
Typical 132 ppm
Moderately soft to medium. Suits most community fish and plants.
Area estimate from nearby wells: USGS well samples in your county (2002–2014).
Carbonate hardness (alkalinity)
66–314 ppm
Typical 275 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From EPA monitoring data (2012–2019).
pH
7.3–7.8
Typical 7.8
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2012–2018).
Total dissolved solids
Area estimate16–503 ppm
Typical 184 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
Area estimate from nearby wells: USGS well samples in your county (2002–2014).
Who supplies Onalaska, TX
Onalaska WSC
Serves 50% of residents · Groundwater (wells) · Chlorine
Canyon Park WSC
Serves 31% of residents · Groundwater (wells) · Chlorine
Lake Livingston Oakridge North
Serves 10% of residents · Lake or river water · Chloramine
Our data comes from public records and is still incomplete. Many utilities don't publish every number, so we're adding more all the time. Your city's range is a starting point: testing your own tap is the only way to know exactly what's in it.
Tap water lookup covers US cities only for now. Want to know why it matters? Read our story on tap water.
Compiled by Shoal & Stem from public records. Free to cite with a link.